Hand holding an ONSO caffeine stick in warm afternoon grass

Any drink. 100 mg.
Nothing else.

ONSO is unflavored caffeine with L-theanine, in a stick. It dissolves clear in whatever you already drink - water, coffee, anything - and tastes like nothing at all.

The Starter Kit

First run

The Starter Kit

The container and your first 30 sticks. It stays on your desk. You stay caffeinated.

4.9 (312)

The Refill

30 sticks in a flat pouch. It arrives through the letterbox, once a month, before you run out.

4.8 (204)

First run

The Starter Kit

The container and your first 30 sticks. It stays on your desk. You stay caffeinated.

4.9 (312)

The Refill

30 sticks in a flat pouch. It arrives through the letterbox, once a month, before you run out.

4.8 (204)

Tastes like nothing

No flavor. No sweetener. No color. No fizz. Drop it in water and the water stays water. Drop it in coffee and the coffee stays coffee. The stick disappears; the caffeine does not. If you can taste it, we did something wrong.

On in twenty minutes

Each stick carries 100 mg of caffeine - about one cup of coffee - paired with 200 mg of L-theanine. It reads like a label because it is the whole label. No proprietary blend, no fourteen-ingredient stack, nothing to research at 11pm. Two ingredients you already know, in amounts printed on the front.

A container you keep. Nothing to explain.

The jar stays out - on the desk, on the shelf, next to the good pens. Refills arrive flat, through the letterbox, once a month. No neon can sweating on your desk. No shaker in your bag. No costume. Just a stick, a glass, and the next five hours of your afternoon.